gccgo_c.c raw

   1  // Copyright 2015 The Go Authors. All rights reserved.
   2  // Use of this source code is governed by a BSD-style
   3  // license that can be found in the LICENSE file.
   4  
   5  //go:build gccgo && !aix && !hurd
   6  
   7  #include <errno.h>
   8  #include <stdint.h>
   9  #include <unistd.h>
  10  
  11  #define _STRINGIFY2_(x) #x
  12  #define _STRINGIFY_(x) _STRINGIFY2_(x)
  13  #define GOSYM_PREFIX _STRINGIFY_(__USER_LABEL_PREFIX__)
  14  
  15  // Call syscall from C code because the gccgo support for calling from
  16  // Go to C does not support varargs functions.
  17  
  18  struct ret {
  19  	uintptr_t r;
  20  	uintptr_t err;
  21  };
  22  
  23  struct ret gccgoRealSyscall(uintptr_t trap, uintptr_t a1, uintptr_t a2, uintptr_t a3, uintptr_t a4, uintptr_t a5, uintptr_t a6, uintptr_t a7, uintptr_t a8, uintptr_t a9)
  24    __asm__(GOSYM_PREFIX GOPKGPATH ".realSyscall");
  25  
  26  struct ret
  27  gccgoRealSyscall(uintptr_t trap, uintptr_t a1, uintptr_t a2, uintptr_t a3, uintptr_t a4, uintptr_t a5, uintptr_t a6, uintptr_t a7, uintptr_t a8, uintptr_t a9)
  28  {
  29  	struct ret r;
  30  
  31  	errno = 0;
  32  	r.r = syscall(trap, a1, a2, a3, a4, a5, a6, a7, a8, a9);
  33  	r.err = errno;
  34  	return r;
  35  }
  36  
  37  uintptr_t gccgoRealSyscallNoError(uintptr_t trap, uintptr_t a1, uintptr_t a2, uintptr_t a3, uintptr_t a4, uintptr_t a5, uintptr_t a6, uintptr_t a7, uintptr_t a8, uintptr_t a9)
  38    __asm__(GOSYM_PREFIX GOPKGPATH ".realSyscallNoError");
  39  
  40  uintptr_t
  41  gccgoRealSyscallNoError(uintptr_t trap, uintptr_t a1, uintptr_t a2, uintptr_t a3, uintptr_t a4, uintptr_t a5, uintptr_t a6, uintptr_t a7, uintptr_t a8, uintptr_t a9)
  42  {
  43  	return syscall(trap, a1, a2, a3, a4, a5, a6, a7, a8, a9);
  44  }
  45